Base Station

1. A base station comprising: a first reception unit configured to receive, from a same user apparatus included in a mobile communication system including the base station, another base station communicating with the base station, and the user apparatus communicating with the base station, first data including quality information used for scheduling controlling performed by the other base station and second data that is different from the first data and includes user data; and a transmission unit configured to transmit the first data including the quality information to the other base station by giving higher priority to the first data including the quality information than to the second data that is received from the same user apparatus as the first data and includes the user data, wherein the quality information and the user data are received from the user apparatus, and the quality information is transmitted to the other base station by giving higher priority to the quality information than to the user data.

2. The base station according to claim 1 , further comprising: a second reception unit configured to receive from the other base station timer information indicating a time limit from receiving the first data to transmitting the received first data to the other base station, wherein the transmission unit discards the first data in the case where the first data cannot be transmitted to the other base station within the time limit.

3. The base station according to claim 2 , wherein, in the case where the first data is discarded, the transmission unit reports to the other base station that the first data has been discarded.

4. The base station according to claim 3 , wherein the first data is at least one of a channel quality indicator, a precoding matrix indicator, a rank indicator, and a sounding reference signal.

5. The base station according to claim 2 , wherein the first data is at least one of a channel quality indicator, a precoding matrix indicator, a rank indicator, and a sounding reference signal.

6. The base station according to claim 1 , wherein the transmission unit transmits to the other base station information indicating staying time from the first data reception from the user apparatus to the transmission to the other base station, and the first data.

7. The base station according to claim 6 , wherein the first data is at least one of a channel quality indicator, a precoding matrix indicator, a rank indicator, and a sounding reference signal.

8. The base station according to claim 1 , wherein the first data is at least one of a channel quality indicator, a precoding matrix indicator, a rank indicator, and a sounding reference signal.

9. A mobile communication system comprising: a base station; another base station communicating with the base station; and a user apparatus communicating with the base station, wherein the base station includes a first reception unit configured to receive, from a same user apparatus, first data including quality information used for scheduling controlling performed by the other base station and second data that is different from the first data and includes user data, and a transmission unit configured to transmit the first data including the quality information to the other base station by giving higher priority to the first data including the quality information than to the second data that is received from the same user apparatus as the first data and includes the user data, the user apparatus includes a transmission unit configured to transmit, to the base station, the first data including the quality information used for scheduling controlling performed by the other base station and the second data that is different from the first data and includes the user data, and the other base station includes a reception unit configured to receive, from the base station, the first data by having higher priority given to the first data including the quality information than to the second data that is received from the same user apparatus as the first data and includes the user data, and wherein the quality information and the user data are received from the user apparatus, and the quality information is transmitted to the other base station by giving higher priority to the quality information than to the user data.